User's Manual

Smart Machine Smart Decision
SIM7100A_User Manual_V1.01 2014-12-11
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T(sudin)
PCM_IN setup time before falling edge of
PCM_CLK
50 – – ns
T(hdin) PCM_IN hold time after falling edge of PCM_CLK 10 – – ns
T(pdout) Delay from PCM_CLK rising to PCM_OUT valid – – 350 ns
T(zdout)
Delay from PCM_CLK falling to PCM_OUT
HIGH-Z
– 160 – ns
Note: SIM7100A can transmit PCM data by USB except for PCM interface.
3.6.5 PCM Application Guide
The mode of SIM7100A PCM can be configured by AT command “AT+CPCM and AT+CPCMFMT”, and
the default configuration is master mode using short sync data format with 2.048MHz PCM_CLK and 8
kHz PCM_SYNC. Please refer to document [21] and document [1] for details.
In addition, the firmware of SIM7100A has integrated the configuration on WM8960GEFL/RV codec
provided by WOLFSON MICROELECTRONICS with I2C interface.
The reference circuit of the reference design of PCM interfaces with external codec IC in the following
figure. It is recommended to use a 26MHz CXO component such as TXC CORPORATION
(www.txccorp.com) 8W26000011.
Figure 27: Reference Circuit of PCM Application with Audio Codec